kolibrios/kernel/branches/net/drivers/bus/pci.inc

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; PCI Bus defines
PCI_HEADER_TYPE = 0x0e ; 8 bit
PCI_BASE_ADDRESS_0 = 0x10 ; 32 bit
PCI_BASE_ADDRESS_5 = 0x24 ; 32 bits
PCI_BASE_ADDRESS_SPACE_IO = 0x01
PCI_VENDOR_ID = 0x00 ; 16 bit
PCI_BASE_ADDRESS_IO_MASK = 0xFFFFFFFC
; PCI programming
PCI_REG_COMMAND = 0x4 ; command register
PCI_REG_STATUS = 0x6 ; status register
PCI_REG_LATENCY = 0xd ; latency timer register
PCI_REG_CAP_PTR = 0x34 ; capabilities pointer
PCI_REG_CAPABILITY_ID = 0x0 ; capapility ID in pm register block
PCI_REG_PM_STATUS = 0x4 ; power management status register
PCI_REG_PM_CTRL = 0x4 ; power management control register
PCI_BIT_PIO = 1 ; bit0: io space control
PCI_BIT_MMIO = 2 ; bit1: memory space control
PCI_BIT_MASTER = 4 ; bit2: device acts as a PCI master
macro find_io bus, dev, io {
local .check, .inc, .got
xor eax, eax
mov esi, PCI_BASE_ADDRESS_0
movzx ecx, bus
movzx edx, dev
.check:
stdcall PciRead32, ecx ,edx ,esi
test eax, PCI_BASE_ADDRESS_IO_MASK
jz .inc
test eax, PCI_BASE_ADDRESS_SPACE_IO
jz .inc
and eax, PCI_BASE_ADDRESS_IO_MASK
mov io , eax
jmp .got
.inc:
add esi, 4
cmp esi, PCI_BASE_ADDRESS_5
jle .check
.got:
}
macro find_mmio32 bus, dev, mmio32 {
local .check, .got
xor eax, eax
mov esi, PCI_BASE_ADDRESS_0
movzx ecx, bus
movzx edx, dev
.check:
stdcall PciRead32, ecx ,edx ,esi
test eax, not PCI_BASE_ADDRESS_IO_MASK
jz .got
add esi, 4
cmp esi, PCI_BASE_ADDRESS_5
jle .check
xor eax, eax
.got:
mov mmio32, eax
}
macro find_irq bus, dev, irq {
push eax edx ecx
movzx ecx, bus
movzx edx, dev
stdcall PciRead8, ecx ,edx ,0x3c ; 0x3c is the offset where irq can be found
mov irq, al
pop ecx edx eax
}
macro find_rev bus, dev, rev {
push eax edx ecx
movzx ecx, bus
movzx edx, dev
stdcall PciRead8, ecx ,edx ,0x8
mov rev, al
pop ecx edx eax
}
macro make_bus_master bus, dev {
movzx ecx, bus
movzx edx, dev
stdcall PciRead32, ecx ,edx, PCI_REG_COMMAND
or al, PCI_BIT_MASTER ;or PCI_BIT_PIO
; and al, not PCI_BIT_MMIO
stdcall PciWrite32, ecx, edx, PCI_REG_COMMAND, eax
;; TODO: try to switch to PIO, and check if PIO works or not..
}